Ophthalmic-test-lens frame



1,481,926 M. POSER OPHTHALMIC TEST LENS FRAME Jan. 29, 1924.

Original Filed March 15, 1916 2 Sheets- Sheet 1 INVENTOR [Va]: P0567"Jan. 29, 1924. 1,481,926

M. POSER OPHTHALMIC TEST LENS FRAME Original Filed March 15, 1916 2Sheets-Sheet 2' WIN 0 INVENTOR fi/aarffiser 712s ATTORNEYS Patented Jan.29, 1924.

W ister ATENT cr me MAX POSER, OF ROCHESTER, NEW YORK, ASSIGNORTOBAITSCH & LOMB OPTICADCOM- PANY, OF ROCHESTER, NEW YORK, CORPORATION OFNEW YORK.

QrHaI- AL Ic-TEsT-L NS FRAME;

Original application filed March 15, 1916, Serial No. 84,358. Dividedand this application filed January 13, 1'919J'Seria1No. 270,794. I I iTo all whom it may concern:

Be it known that I, MAX Posnir, a subject of the Grand Duke of SaxonWeimar, resid ing at Rochester, in the county of Monroe and State of NewYork, have invented certain new and useful Improvements inOphthalmic-Test-Lens Frames; and I do declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of this specification, and tothe characters of reference! marked thereon."

My invention relates to apparatus for] optical purposes and used intesting the refraction of a patients eyes and obtaining the necessarydata for 'fittingeyeglasses. More particularly my invention relates to atest lensframe that is portable andjthat is to be supported in positionbefore a patients eyes by means of a nosepiece resting on the patientsnose and a pair of temples by which the devioevis held'in position. Thepresentinvention is a division of my former application filed Mar. 15,1916, Serial No. 84,858 for ophthalmic frames. v

The object of my invention is to provide a test lens frame wherein afterall adjustments have'been made and the patients been satisfactorilyrefracted" all eyes have the readmgs may be taken without d sarrangingany of the adjustments or remov 111g any of the trial'lenses. Anotherob} ject of my invention is to provide two in-, dependent adjustmentsfor the frame supg porting nosepiece, one ina vertical direction and onein a horizontal direction eX- tending in the general direction of theline of vision of the patient to whomthe appa-f ratus is applied,whereby theapparatus may readily be accommodated to those variations offacial features met with in differ ent' patients which variationsinvolve the shape of the nose, the length of the eyelashes and the depthof the eye sockets.

In the drawings:

Figure 1 is a plan view of a test lens frame constructed according to myinven: tion,

Figure 2 is a front elevation ofv the same,v

Figure 3 is a side elevation with parts broken away. y t Figure 4 is asection on the line lf-A? of Figure 3,

test lens F igure 5 is a section on the line 5 5* of Figure 2. showingthe adjustments of the nose piec'e. v v

Figure 6 is a section on line (B -6 of Figures 9 and 10' are plan viewsof a prism lens mount and a cylinder lens mount respectively adapted tobe used with my test lens frame.

Similar reference numerals refer to the same parts throughout thefigures "of the drawings. v I v In the preferred embodiment of myinvention a foundation fran e,"coniprising a central bridge member 1 issecured to a rigid, central head 1 and two U-shaped rigidly fastenedarms 2, 2, extend laterally, one fromvthe righthand sideand one from theleft-hand side of thelhead 1. In the front face of a boss 4? whichprojects forwardly fromtheh'ead 1, is formed a chan nel in which slidesthe vertical graduated nosepiece bar lOwhich'is held in said channel.byacap plate 5. To the lower end of the bar 10 is secured the, block12in which is slidably mounted the horizontal graduated' nosepiece bar13 on the rear end of which is hinged, so as to be movable in a verticalplane, the nosepiece proper 14. By means ofv asc'rew l5 tapped in athreaded openingin the boss 4; and having a knurled Two slotted brackets20, 20, are secured to therear face of the outer ends of each of thearms 2 by means of screws, and a, U shaped temple spring 23 of resilientmaterial is securedtoqeach pair of brackets 20 at the; spring arms 22which fit in the slotted portionsofsaid brackets and are rigidly heldtherein by the'screws 24:. The closed end of each of the springs '23 isprovided with an ear or extension 23 within which is threaded a stud 25.Upon each of the studs 25 is mounted a hub 28 carrying an integralrearwardly projecting arm 29, and the outer end of the stud 25 isthreaded and receives a nut 30 between which and the arm 23 the hub 28is clamped. By loosening the nut 30 the arm 29 may be adjusted angularlywith relation to the spring 23, and the desired positions of adjustmentmaintained by tightening the nut 30.

A pair of temples 34 cooperate with the nosepiece 14 to hold theapparatus before the patients eyes. The nosepiece serves to locate andsupport the foundation frame bodily, while the temples, which are hingedto the lugs 35, formed on the arms 29, are clamped to the patients headby means of set screws 36 which are threaded in the bosses 37 on therear end of arms 29, thus the temples position the foundation frame and.hold it to the patients head.

The portion of the apparatus thus far described relates to thefoundation frame and the means for securing said frame before the eyesof the patient. Carrying members 40 and 50 are provided for the 'triallenses which are mounted so as to be laterally adjustable Within therigid upper portion of the head 1 of the foundation frame. This lateraladjustment is for the purpose of accommodating the trial lens carriersindependently to various lateral distances between a patients nose andthe pupil of each of his eyes. The vertical adjustment of the trial lenscarrying members 40, 50, is effected first by means of the screw 15which raises or lowers the frame body with relation to both of thepatients eyes, this adjustment being for the purpose of bringing thetrial lens carrier 4.0 in alinement with the patients right eye. Anadditional inde pendent vertical adjustment is provided for adjustingthe trial lens carrier 50 with relation to the patients left eye andthus the instrument is readily accommodated to those patients whose eyesdo not lie normally in the same horizontal plane.

In carrying out these features of my invention, I preferably fix thetrial lens carrier 4:0 to a bar 41 depending from a laterally movableslide 42 which is mounted in the head 1. A rack and pinion adjustmentoperated by the pinion 43 mounted on a shaft having a fingerpiece L3 isprovided as a convenient means for effecting a lateral adjustment of themember e0. The left eye trial lens carrier 50 is fixed to a bar 51 whichterminates at its upper end in a graduated slide 54, mounted in avertical slideway member 52 the latter being partly formed integral withthe. horizontal slide 53 which in turn is mounted in a horizontalslideway in the head 1. The vertical slide 5a and the horizontal slideare each provided with a rack and pinion adjustment, the pinion 55mounted on a shaft having a fingerpiece 55 providing a convenient meansfor independently adjust ing the carrier 50 vertically, while the pinion56 mounted on a shaft having a fingerpiece 50 provides a convenientmeans for independently adjusting said carrier 50 laterally.

In the forward face of the slideway 52 is formed a bevel sided aperture57 which reveals the graduations formed on the front face of thevertical slide 54L. The horizontal mark or pointer on the left verticalside of the beveled aperture, see Figure 2, provides an index with whichthe scale on the slide 54 cooperates, whereby the extent of elevation ordepression of the trial lens carrier 50 relatively to a normal positionis indicated. For indicating the lateral position of the patients pupilswith relation to the bridge of the nose and with relation to each other,a pair of depending pointers l4 and 58 are provided, one on the forwardface of eachof the trial lens carriers 40, 50, as best shown in Figure2.

The pointers cooperate with a pair of scales 2 secured to the forwardfaces of the arms 2Q By means of the pointers 4:4 and 58 and theircooperating scales 2, the lateral location of the patients pupils fromthe center of the bridge of the nose may be read directly.

For measuring the distance between the cornea of either of the patientseyes and the vertex of the adjacent surface of a trial lens placedimmediately before either eye, a sighting device mounted on a graduatedslide bar, is provided for each eye. By, this means, if the. apex of thecornea of either eye is properly sighted, the distance from said corneato the respective lens vertex will be measured by the scale on the slidebar. To this end I provide the sight bars 60 each of which carries apair of cooperating sights namely; a sight 61 at its outer end and asight 62 at its inner end. The sight 61 is a dovetailed slot and thesight 62 is a cooperating angular projection, as shownin Figure 3. Eachsight bar 60 is carried on the rear end of a graduated slide bar 63 andis adjustable forwardly and backwardly by means of the screws 64: havinga knurled fingerpiece 64. The slides 63 are each mounted in a recessformed in a boss extending rearwardly from the respective arms 2, andheld in said recess by a plate 65, relatively to which the scale at thelower edge of the slide 63 may be read. The position of the sight bars60 is such that they lie in the same horizontal plane as the eyes of thepatient and the arrangement of the temple springs 23 relative to thesight bar 60 and a slide 63 is such that the sighting bar is readilyaccommodated between the arms 22 Cal of the temple springs 23. In usingthe sighting device for measuring the distance between respectivecorneas and trial lenses, it is merely necessary to bring into alinementthe apex of the respective cornea and the adjacent pair of sights 61,62, which is easily effected by means of the screws 64, when thedistance-from the apex of either cornea to the vertex of its respectivetrial lens may be read directly from the scale on the slide bar 63. Thegraduations on the slide 63 are so arranged that, when the gradutionsregister zero, the. line of sight will be coincident with that vertex ofthe spherical lens which faces the patients eye which in this case isthe vertex of the concave side.

Each of the trial lens carrying members comprises three downwardlycurved spaced walls supported on studs 72, so as to form a rear pocketfor a spherical lens in its mount and an intermediate pocket 71 for acylindrical lens in its mount and a pocket formed by depressions in thestuds 72 for carrying a prism lens in its mount.

The cylindrical trial lens mount comprises a disk 71 in which acylindrical lens is mounted with its longitudinal axis indicated by anindex line 71. The periphery of the disk 71 is provided with a. seriesof transverse knurled corrugations designed to coopcrate with a smallknurled pinion 7 3 on the lens carrier adapted to rotate the disk 71 ashereinafter pointed out. The prism lens mount 72 is prepared bycementing the lens on a transparent mounting which may be made ofcelluloid. The position of the base of the prism trail lens is indicatedby an index 72 formed on the mount perpendicular to the base of theprism lens.

The eyes of the patient are refracted in usual manner, using if requireda set of spherical trial lenses set in mounts which are adapted to beinterchangeably substituted in the carrier pockets 70 in the usualmanner. The cylindrical trial lenses set in mounts 71 are inserted inthe. pockets 71, when the knurled periphery 71 of the mount rests uponthe knurled pinion 73 which is journaled in the boss 74, formed integralwith the front portion of the trail lens holders 40 and 50. A knob 75 isprovided for rotating each pinion 73. The knurling of the pinion 73 andthe knurling of the periphery of the cylinder lens mount correspond sothat a transversely corrugated periphery of the knurled wheel 73 mesheswith the knurled corrugation 71 of the lens mount 71, the pinion 7 3 andthe lens mount 71 cooperating in the manner of a pinion and gear. Ascale 77 is provided on the front wall of each lens carrier pocket 71and with this scale the index mark 71 on the cylindrical lens mountcooperates, whereby the position of the axis of a patients astigmatismmay be readily ascertained.

when prismatic refraction is required, a prism lens in a transparentmounting as described is adapted to be placed in the pocket formingdepressions in the carrier studs 72 and after the proper position of theprism base has been found, which is readily done by rotating the mount,the position on the base may be. conveniently read through thetransparent mount 72 since its index mark 72 then overlies the scale 7 7on the trial lens carrier.

Having described my invention what I claim and desire to secure byLetters Patent is:

1. In an optical apparatus for testing eyes, the combination of a rigidhead, a nose piece adjustable on said head, means for adjusting the nosepiece on the head for positioning the apparatus in the proper horizontalplane before a patients eyes, means for indicating the adjustment of thenosepiece, a pair of trial lens carriers laterally adjustable on saidhead, means for indicating the lateral position of said carriers, meansfor adjusting one of said carriers vertically, means for indicating thevertical adjustment thereof, a pair of curved arms extending downwardlyand laterally from said rigid head, a pair of flexible templesadjustably connected to said curved arms, means on said curved arms formeasuring the distance between the cornea of a patients eye and thevertex of the adjacent surface of a trial lens in the carrier, and ascale on each of the carriers adapted to cooperate with an index on atrial lens mount, the arrangement being such that when all adjustmentshave been made all readings may 'be taken without disarranging any ofthe adjustments or removing the trial lenses.

2. In an ophthalmic test lens frame, the combination with a head piece,of a plurality of trial lens holders, a nose piece, a horizontallyadjustable member pivotally supporting said nose piece, a devicesupporting said member for horizontal adjustment, and means foradjusting said device vertically.

3. In an ophthalmic test lens frame, the combination with a head piece,of a plurality of trial lens holders provided thereon, a nose piece forsupporting said head piece, means for both adjusting and indicating thelateral displacement of the trial lens holders for each eye relative tosaid nose piece, means for both adjusting and indicating the verticaladjustment of the nose piece relative to the head piece and trial lensholders, and means for adjusting and indicating the displacement of theholders for both eyes front or back of the nose piece.

4:. In an optical apparatus for testing eyes, the combination of a rigidhead, a pair of downwardly and outwardly extending arms secured thereto,a pair of flexible temples secured to said arms, a pair of trial lenscarriers adjustably supported on said head, a nosepiece cooperating withsaid temples to support the apparatus on a patients head and separatemeans for adjusting the nosepiece vertically and horizontally to varythe position of the apparatus and bring the trial lens carriers intoproper relation witha patients eyes, and means for indicating the extentof both the vertical and horizontal adjustment of the nosepiece.

5. In an optical apparatus for testing eyes, the combination of a rigidhead, a pair of downwardly and outwardly extending arms secured thereto,a pair of flexible temples secured to said arms, a pair of trial lenscarriers adjustably supported on said head, a nosepiece cooperating withsaid temples to support the apparatus on a patients, head, a

horizontally adjustable bar on which the nosepiece is mounted, and a barslidably mounted in said head and vertically adjustable therein and bywhich said first mentioned bar is carried.

6. The combination with an ophthalmic test lens frame as claimed inclaim 3, of acornea gauge adjustably connected With said trial lensholders for indicating the distance between the eyeand a trial lens.

7. The combination with an ophthalmic test lensframe as claimed in claim3, of a cornea gauge adjustable in the head piece and means associatedtherewith for indicating the distance between the eye and trial lensholder.

MAX POSER. c

